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https://issues.apache.org/jira/browse/ARROW-7104?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wes McKinney updated ARROW-7104:
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Component/s: Go
> [Go] Unable to Resize/Reserve more space on ListBuilder after init
> ------------------------------------------------------------------
>
> Key: ARROW-7104
> URL: https://issues.apache.org/jira/browse/ARROW-7104
> Project: Apache Arrow
> Issue Type: Bug
> Components: Go
> Environment: mac
> Reporter: Richard Whitcomb
> Priority: Major
>
> When using the ListBuilder unless I reserve enough capacity on the initialize
> resize/init call I run into. Based on the code I would expect to be able to
> grow the list builder after the initial call to reserve capacity.
> {code:java}
> panic: runtime error: index out of range [33] with length 33
> [recovered]panic: runtime error: index out of range [33] with length 33
> [recovered] panic: runtime error: index out of range [33] with length 33
> github.com/apache/arrow/go/arrow/array.(*Int32Builder).UnsafeAppend(...)github.com/apache/arrow/go/arrow/array.(*Int32Builder).UnsafeAppend(...)
>
> external/com_github_apache_arrow/go/arrow/array/numericbuilder.gen.go:479github.com/apache/arrow/go/arrow/array.(*Int32Builder).Append(0xc0000d3b00,
> 0x21)
> external/com_github_apache_arrow/go/arrow/array/numericbuilder.gen.go:469
> +0xa9github.com/apache/arrow/go/arrow/array.(*ListBuilder).appendNextOffset(0xc0000d3b60)
> external/com_github_apache_arrow/go/arrow/array/list.go:152
> +0x4fgithub.com/apache/arrow/go/arrow/array.(*ListBuilder).Append(0xc0000d3b60,
> 0xc0000d0001) external/com_github_apache_arrow/go/arrow/array/list.go:158
> +0x90
> {code}
> Where the default slice size in the builders is 32.
> If I print out the capacity and length of the builder I do see it grow as
> expected prior to this error. My best guess is that while the capacity on
> the value builder is growing the resize calls aren't making its way to the
> offset int32 builder which is why you see that in the above stack.
> {code:java}
> Cap()=64 Len()=32{code}
> I am using tag *apache-arrow-0.15.1*
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